Gastroenterology Practice Questions

Q: Capsule endoscopy is used for:

Bleeding. ***Bleeding*** - Capsule endoscopy is primarily used to investigate **obscure gastrointestinal bleeding** when upper endoscopy and colonoscopy are negative, allowing for visualization of the **small bowel** [3]. - It helps identify sources of bleeding such as **angiodysplasias**, small bowel tumors, or ulcers that are inaccessible by conventional scopes [3]. *GERD* - **Gastroesophageal reflux disease (GERD)** is typically diagnosed clinically based on symptoms and can be confirmed with **upper endoscopy** [1] or **pH monitoring**, not capsule endoscopy. - Capsule endoscopy offers no functional assessment of the lower esophageal sphincter or pH within the esophagus. *Motility disorder* - **Motility disorders** are diagnosed through specialized tests like **esophageal manometry** or **gastric emptying studies**, which assess the muscular function of the GI tract. - Capsule endoscopy provides static images and cannot evaluate the propulsive movements of the gut. *Peritoneal metastasis* - **Peritoneal metastasis** involves cancer spread to the lining of the abdomen and is often diagnosed via **cross-sectional imaging** (CT, MRI) [2] or **laparoscopy with biopsy**. - Capsule endoscopy visualizes the lumen of the bowel and cannot detect lesions outside the bowel wall, such as peritoneal implants.

Q: Which of the following statements about celiac disease is false?

Celiac disease is caused by a viral infection.. ### Celiac disease is caused by a viral infection - Celiac disease is an **autoimmune disorder**, not a viral infection, triggered by the ingestion of **gluten** in genetically predisposed individuals [1]. - The immune response causes inflammation and damage to the **small intestinal lining**. ### Diarrhea, Malabsorption, iron deficiency anaemia - These are **classic symptoms** and common complications of celiac disease due to the damage to the small intestinal villi, impairing nutrient absorption [1]. - **Malabsorption** leads to various deficiencies, including iron deficiency anemia [2]. ### Diagnosis requires duodenal biopsy showing villous atrophy - A definitive diagnosis typically involves an **endoscopic biopsy** of the small intestine, which reveals characteristic findings like **villous atrophy**, crypt hyperplasia, and increased intraepithelial lymphocytes [1]. - This **histological evidence** is crucial for confirming the diagnosis. ### Patients express HLA DQ2 or DQ8 haplotypes - The presence of **HLA-DQ2 or HLA-DQ8 Class II major histocompatibility complex (MHC) allelic variants** is a strong genetic predisposition for celiac disease [1]. - While necessary, these **haplotypes** are not sufficient for diagnosis, as many individuals with these genes never develop the condition.

Q: Which of the following conditions is NOT typically associated with H. pylori infection?

Fundal atrophic gastritis. ***Fundal atrophic gastritis*** - While *H. pylori* can cause multifocal atrophic gastritis impacting the antrum and body, **fundal atrophic gastritis** typically refers to **autoimmune atrophic gastritis** which spares the antrum [2] and is not directly caused by *H. pylori*. - Autoimmune atrophic gastritis is characterized by antibodies to **parietal cells** and **intrinsic factor**, leading to vitamin B12 deficiency [2]. *Gastric ulcer* - *H. pylori* infection is a leading cause of **gastric ulcers**, often by inducing chronic inflammation that compromises the mucosal protective barrier [4]. - The bacteria colonize the gastric antrum, contributing to local inflammation and increased acid production, leading to ulcer formation [1]. *Duodenal ulcer* - The vast majority of **duodenal ulcers** are associated with *H. pylori* infection, which is a major factor in their pathogenesis [1]. - *H. pylori* colonization of the gastric antrum can lead to increased gastrin release, elevated acid secretion, and resultant duodenal mucosal injury [1]. *Gastric lymphoma* - Specifically, **Mucosa-Associated Lymphoid Tissue (MALT) lymphoma** of the stomach is strongly linked to chronic *H. pylori* infection [3]. - Eradication of *H. pylori* can lead to regression of low-grade gastric MALT lymphoma in a significant number of cases [3].

Q: A middle-aged woman presents to her physician with fatigue, pruritus, and steatorrhea. Further studies demonstrate primary biliary cholangitis and the presence of antimitochondrial antibodies. If left untreated, this patient is also at increased risk of developing which of the following?

Increased serum cholesterol levels due to cholestasis. ***Markedly increased serum cholesterol*** - Patients with **primary biliary cholangitis** (PBC) often have **cholestasis** leading to elevated cholesterol levels due to impaired bile salt excretion. - Untreated PBC can progress, increasing the risk of **hyperlipidemia**, including markedly elevated serum cholesterol levels, evidenced by xanthomatous deposits [1]. *Markedly increased serum pyruvic acid* - Increased serum pyruvic acid typically indicates issues with **glycolysis** or **liver metabolism**, which are not primary complications of PBC. - This condition is more associated with **lactic acidosis** or certain genetic disorders, not directly related to the severe cholestatic picture seen in this patient. *Markedly decreased PaO2* - Markedly decreased **PaO2** suggests respiratory failure or severe lung disease, not a complication of cholestatic liver disease. - This does not typically correlate with PBC, where the main concerns are liver function and metabolism, not oxygenation. *Markedly decreased serum uric acid* - Decreased serum uric acid is typically seen in conditions like **chronic liver disease**, but it is not a hallmark of PBC or its complications. - PBC is more associated with **autoimmune disorders** [1] rather than metabolic alterations affecting uric acid levels in this context.

Q: In which condition are Anti-Gliadin antibodies typically detectable?

Celiac disease (gluten sensitivity). ***Celiac disease*** - The presence of **Anti-Gliadin antibodies** is a hallmark of celiac disease, which is an autoimmune disorder triggered by gluten ingestion [1]. - These antibodies indicate an inappropriate immune response to gluten, leading to **intestinal damage** and malabsorption [1][2]. *Whipple's disease* - Characterized by **trophic intestinal lesions**, but not associated with **Anti-Gliadin antibodies**; instead, it involves a different pathogenesis linked to the bacterium *Tropheryma whipplei*. - Symptoms include **malabsorption**, **weight loss**, and systemic issues like arthritis and CNS symptoms, unrelated to gluten. *Tropical sprue* - This condition is caused by **nutritional deficiencies**, particularly due to malabsorption in tropical regions, without a specific autoimmune response to gluten seen in celiac disease. - Typically presents with **diarrhea** and **weight loss**, but **Anti-Gliadin antibodies** are not typically detectable. *Intestinal lymphoma* - While intestinal lymphoma may occur in patients with celiac disease as a complication, it does not produce **Anti-Gliadin antibodies** as part of its pathophysiology. - The presence of these antibodies does not indicate lymphoma; the condition usually involves a more complex array of symptoms and does not directly relate to gluten sensitivity.

Q: Plummer-Vinson syndrome is characterized by all of the following except:

Megaloblastic anemia. ***Megaloblastic anemia*** - Plummer-Vinson syndrome is associated with **iron deficiency anemia**, not megaloblastic anemia [2]. - **Megaloblastic anemia** is caused by deficiencies in **vitamin B12** or **folate**, leading to impairment in DNA synthesis [1]. *Glossitis* - **Glossitis**, or inflammation of the tongue, is a common symptom of Plummer-Vinson syndrome due to **iron deficiency**. - This symptom can contribute to the difficulty in swallowing experienced by patients. *Iron deficiency anemia* - **Iron deficiency anemia** is a primary characteristic of Plummer-Vinson syndrome, leading to various symptoms [2]. - The anemia is thought to contribute to the formation of esophageal webs which cause dysphagia. *Dysphagia* - **Dysphagia**, or difficulty swallowing, is a hallmark symptom of Plummer-Vinson syndrome, usually caused by **esophageal webs**. - These webs are thin mucosal folds that form in the upper esophagus, obstructing **food passage**.

Q: Best test for small intestine malabsorption of carbohydrates is

D-Xylose test. ***D-Xylose test*** - The **D-xylose absorption test** is specifically designed to assess the absorptive function of the **small intestine** for **carbohydrates**. - D-xylose is a **monosaccharide** that does not require enzymatic digestion before absorption, making it an excellent indicator of mucosal integrity. *Lund meal test* - The **Lundh test** is used to evaluate **exocrine pancreatic function** by measuring the release of digestive enzymes after a standardized meal [1]. - It is not primarily used to assess small intestine carbohydrate absorption. *Schilling test* - The **Schilling test** is specifically used to diagnose **vitamin B12 (cobalamin) malabsorption** and to differentiate its causes, such as pernicious anemia or intrinsic factor deficiency [2]. - It does not directly assess carbohydrate absorption. *Follacin test* - This term is likely a misspelling or an unfamiliar test name in the context of malabsorption. - **Folate (folic acid)** levels can be measured to assess nutritional status [3], but there isn't a widely recognized "follacin test" for carbohydrate malabsorption.

Q: In Budd-Chiari syndrome, there is obstruction to which of the following?

Larger hepatic veins. ***Larger hepatic veins*** - **Budd-Chiari syndrome** is specifically defined by obstruction of the **hepatic veins** or the segment of the inferior vena cava draining the hepatic veins, leading to impaired blood flow out of the liver [1]. - This blockage causes **congestion** within the liver, resulting in symptoms like ascites, hepatomegaly, and abdominal pain [1]. *Inferior vena cava* - While obstruction can occur in the **inferior vena cava (IVC)**, it often specifically refers to the suprahepatic portion or involvement of the **hepatic vein ostia** secondary to thrombosis, rather than the entire IVC. - Obstruction of the IVC below the hepatic veins would manifest with different symptoms, primarily **lower extremity edema**, and would not directly cause the classic liver congestion seen in Budd-Chiari. *Hepatic artery* - Obstruction of the **hepatic artery** typically leads to **hepatic infarction** or ischemia, which is a different clinical entity from Budd-Chiari syndrome. - This is less common due to the liver's dual blood supply from both the hepatic artery and portal vein. *Portal vein* - **Portal vein obstruction** or thrombosis leads to **portal hypertension** but does not cause the characteristic liver congestion and outflow obstruction seen in Budd-Chiari syndrome. - Symptoms would include ascites and variceal bleeding, but without the immediate hepatic venous outflow impairment.

Q: Which of the following statements accurately describes the properties of lithogenic bile?

Decreased bile acid and cholesterol ratio. Decreased bile acid and cholesterol ratio - Lithogenic bile, a precursor to **cholesterol gallstones**, is characterized by a relatively **lower concentration of bile acids** compared to cholesterol [2]. - This imbalance leads to the supersaturation of bile with cholesterol, causing it to precipitate and form crystals [1]. *Decreased cholesterol only* - This statement is incorrect because decreased cholesterol alone would typically make bile **less lithogenic**, reducing the risk of cholesterol crystallization. - The problem in lithogenic bile is often an **excess of cholesterol relative to solubilizing agents**, not a general decrease in cholesterol [2]. *Increased bile acid and cholesterol ratio* - An **increased bile acid to cholesterol ratio** would mean there are more bile acids available to keep cholesterol in solution. - This would make the bile **less lithogenic** or even protective against gallstone formation [2]. *Equal bile acid and cholesterol ratio* - While exact ratios vary, an equal ratio would likely not be the condition for lithogenic bile, as bile acids typically need to be in **higher proportions** to effectively emulsify and solubilize cholesterol [2]. - The critical factor for lithogenicity is the **imbalance leading to supersaturation**, not necessarily an equal ratio.

Question 1

Capsule endoscopy is used for:

Accepted Answer

Bleeding

Answer

GERD

Answer

Motility disorder

Answer

Peritoneal metastasis

Question 2

Which of the following statements about celiac disease is false?

Accepted Answer

Celiac disease is caused by a viral infection.

Answer

Diagnosis requires duodenal biopsy showing villous atrophy

Answer

Diarrhea, Malabsorption, iron deficiency anaemia

Answer

Patients express HLA DQ2 or DQ8 haplotypes

Question 3

Which of the following conditions is NOT typically associated with H. pylori infection?

Accepted Answer

Fundal atrophic gastritis

Answer

Gastric ulcer

Answer

Duodenal ulcer

Answer

Gastric lymphoma

Question 4

A middle-aged woman presents to her physician with fatigue, pruritus, and steatorrhea. Further studies demonstrate primary biliary cholangitis and the presence of antimitochondrial antibodies. If left untreated, this patient is also at increased risk of developing which of the following?

Accepted Answer

Increased serum cholesterol levels due to cholestasis

Answer

Severe respiratory failure

Answer

Decreased serum uric acid levels

Answer

Increased serum pyruvic acid levels

Question 5

In which condition are Anti-Gliadin antibodies typically detectable?

Accepted Answer

Celiac disease (gluten sensitivity)

Answer

Tropical sprue (malabsorption syndrome)

Answer

Intestinal lymphoma (malignancy)

Answer

Whipple's disease (systemic infection)

Question 6

Plummer-Vinson syndrome is characterized by all of the following except:

Accepted Answer

Megaloblastic anemia

Answer

Iron deficiency anemia

Answer

Dysphagia

Answer

Glossitis

Question 7

Best test for small intestine malabsorption of carbohydrates is

Accepted Answer

D-Xylose test

Answer

Lund meal test

Answer

Follacin test

Answer

Schilling test

Question 8

In Budd-Chiari syndrome, there is obstruction to which of the following?

Accepted Answer

Larger hepatic veins

Answer

Inferior vena cava

Answer

Hepatic artery

Answer

Portal vein

Question 9

Which of the following statements accurately describes the properties of lithogenic bile?

Accepted Answer

Decreased bile acid and cholesterol ratio

Answer

Decreased cholesterol only

Answer

Increased bile acid and cholesterol ratio

Answer

Equal bile acid and cholesterol ratio

Question 10

Which of the following statements about Peutz-Jeghers syndrome is false?

Accepted Answer

Peutz-Jeghers syndrome is characterized by hyperplastic polyps

Answer

Polypectomy during colonoscopy is the treatment of choice.

Answer

The most common site for polyps is the small intestine.

Answer

Peutz-Jeghers syndrome is characterized by hamartomatous polyps.

Gastroenterology — MCQs

Gastroenterology — MCQs

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